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        <h3>querystring&nbsp; <span class="subtitle">3.3.0</span></h3>
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                        <div class="highlight"><pre><span class="cm">/**</span>
<span class="cm"> * Provides Y.QueryString.stringify method for converting objects to Query Strings.</span>
<span class="cm"> *</span>
<span class="cm"> * @module querystring</span>
<span class="cm"> * @submodule querystring-stringify</span>
<span class="cm"> * @for QueryString</span>
<span class="cm"> * @static</span>
<span class="cm"> */</span>

<span class="kd">var</span> <span class="nx">QueryString</span> <span class="o">=</span> <span class="nx">Y</span><span class="p">.</span><span class="nx">namespace</span><span class="p">(</span><span class="s2">&quot;QueryString&quot;</span><span class="p">),</span>
    <span class="nx">stack</span> <span class="o">=</span> <span class="p">[],</span>
    <span class="nx">L</span> <span class="o">=</span> <span class="nx">Y</span><span class="p">.</span><span class="nx">Lang</span><span class="p">;</span>

<span class="cm">/**</span>
<span class="cm"> * Provides Y.QueryString.escape method to be able to override default encoding</span>
<span class="cm"> * method.  This is important in cases where non-standard delimiters are used, if</span>
<span class="cm"> * the delimiters would not normally be handled properly by the builtin</span>
<span class="cm"> * (en|de)codeURIComponent functions.</span>
<span class="cm"> * Default: encodeURIComponent</span>
<span class="cm"> * @module querystring</span>
<span class="cm"> * @submodule querystring-stringify</span>
<span class="cm"> * @for QueryString</span>
<span class="cm"> * @static</span>
<span class="cm"> **/</span>
<span class="nx">QueryString</span><span class="p">.</span><span class="nx">escape</span> <span class="o">=</span> <span class="nb">encodeURIComponent</span><span class="p">;</span>

<span class="cm">/**</span>
<span class="cm"> * &lt;p&gt;Converts an arbitrary value to a Query String representation.&lt;/p&gt;</span>
<span class="cm"> *</span>
<span class="cm"> * &lt;p&gt;Objects with cyclical references will trigger an exception.&lt;/p&gt;</span>
<span class="cm"> *</span>
<span class="cm"> * @method stringify</span>
<span class="cm"> * @public</span>
<span class="cm"> * @param obj {Variant} any arbitrary value to convert to query string</span>
<span class="cm"> * @param cfg {Object} (optional) Configuration object.  The three</span>
<span class="cm"> * supported configurations are:</span>
<span class="cm"> * &lt;ul&gt;&lt;li&gt;sep: When defined, the value will be used as the key-value</span>
<span class="cm"> * separator.  The default value is &quot;&amp;&quot;.&lt;/li&gt;</span>
<span class="cm"> * &lt;li&gt;eq: When defined, the value will be used to join the key to</span>
<span class="cm"> * the value.  The default value is &quot;=&quot;.&lt;/li&gt;</span>
<span class="cm"> * &lt;li&gt;arrayKey: When set to true, the key of an array will have the</span>
<span class="cm"> * &#39;[]&#39; notation appended to the key.  The default value is false.</span>
<span class="cm"> * &lt;/li&gt;&lt;/ul&gt;</span>
<span class="cm"> * @param name {String} (optional) Name of the current key, for handling children recursively.</span>
<span class="cm"> * @static</span>
<span class="cm"> */</span>
<span class="nx">QueryString</span><span class="p">.</span><span class="nx">stringify</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">obj</span><span class="p">,</span> <span class="nx">c</span><span class="p">,</span> <span class="nx">name</span><span class="p">)</span> <span class="p">{</span>
    <span class="kd">var</span> <span class="nx">begin</span><span class="p">,</span> <span class="nx">end</span><span class="p">,</span> <span class="nx">i</span><span class="p">,</span> <span class="nx">l</span><span class="p">,</span> <span class="nx">n</span><span class="p">,</span> <span class="nx">s</span><span class="p">,</span>
        <span class="nx">sep</span> <span class="o">=</span> <span class="nx">c</span> <span class="o">&amp;&amp;</span> <span class="nx">c</span><span class="p">.</span><span class="nx">sep</span> <span class="o">?</span> <span class="nx">c</span><span class="p">.</span><span class="nx">sep</span> <span class="o">:</span> <span class="s2">&quot;&amp;&quot;</span><span class="p">,</span>
        <span class="nx">eq</span> <span class="o">=</span> <span class="nx">c</span> <span class="o">&amp;&amp;</span> <span class="nx">c</span><span class="p">.</span><span class="nx">eq</span> <span class="o">?</span> <span class="nx">c</span><span class="p">.</span><span class="nx">eq</span> <span class="o">:</span> <span class="s2">&quot;=&quot;</span><span class="p">,</span>
        <span class="nx">aK</span> <span class="o">=</span> <span class="nx">c</span> <span class="o">&amp;&amp;</span> <span class="nx">c</span><span class="p">.</span><span class="nx">arrayKey</span> <span class="o">?</span> <span class="nx">c</span><span class="p">.</span><span class="nx">arrayKey</span> <span class="o">:</span> <span class="kc">false</span><span class="p">;</span>

    <span class="k">if</span> <span class="p">(</span><span class="nx">L</span><span class="p">.</span><span class="nx">isNull</span><span class="p">(</span><span class="nx">obj</span><span class="p">)</span> <span class="o">||</span> <span class="nx">L</span><span class="p">.</span><span class="nx">isUndefined</span><span class="p">(</span><span class="nx">obj</span><span class="p">)</span> <span class="o">||</span> <span class="nx">L</span><span class="p">.</span><span class="nx">isFunction</span><span class="p">(</span><span class="nx">obj</span><span class="p">))</span> <span class="p">{</span>
        <span class="k">return</span> <span class="nx">name</span> <span class="o">?</span> <span class="nx">QueryString</span><span class="p">.</span><span class="nx">escape</span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">+</span> <span class="nx">eq</span> <span class="o">:</span> <span class="s1">&#39;&#39;</span><span class="p">;</span>
    <span class="p">}</span>

    <span class="k">if</span> <span class="p">(</span><span class="nx">L</span><span class="p">.</span><span class="nx">isBoolean</span><span class="p">(</span><span class="nx">obj</span><span class="p">)</span> <span class="o">||</span> <span class="nb">Object</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">toString</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="nx">obj</span><span class="p">)</span> <span class="o">===</span> <span class="s1">&#39;[object Boolean]&#39;</span><span class="p">)</span> <span class="p">{</span>
        <span class="nx">obj</span> <span class="o">=+</span> <span class="nx">obj</span><span class="p">;</span>
    <span class="p">}</span>

    <span class="k">if</span> <span class="p">(</span><span class="nx">L</span><span class="p">.</span><span class="nx">isNumber</span><span class="p">(</span><span class="nx">obj</span><span class="p">)</span> <span class="o">||</span> <span class="nx">L</span><span class="p">.</span><span class="nx">isString</span><span class="p">(</span><span class="nx">obj</span><span class="p">))</span> <span class="p">{</span>
        <span class="c1">// Y.log(&quot;Number or string: &quot;+obj);</span>
        <span class="k">return</span> <span class="nx">QueryString</span><span class="p">.</span><span class="nx">escape</span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">+</span> <span class="nx">eq</span> <span class="o">+</span> <span class="nx">QueryString</span><span class="p">.</span><span class="nx">escape</span><span class="p">(</span><span class="nx">obj</span><span class="p">);</span>
    <span class="p">}</span>

    <span class="k">if</span> <span class="p">(</span><span class="nx">L</span><span class="p">.</span><span class="nx">isArray</span><span class="p">(</span><span class="nx">obj</span><span class="p">))</span> <span class="p">{</span>
        <span class="nx">s</span> <span class="o">=</span> <span class="p">[];</span>
        <span class="nx">name</span> <span class="o">=</span> <span class="nx">aK</span> <span class="o">?</span> <span class="nx">name</span> <span class="o">+</span> <span class="s1">&#39;[]&#39;</span> <span class="o">:</span> <span class="nx">name</span><span class="p">;</span>
        <span class="nx">l</span> <span class="o">=</span> <span class="nx">obj</span><span class="p">.</span><span class="nx">length</span><span class="p">;</span>
        <span class="k">for</span> <span class="p">(</span><span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">i</span> <span class="o">&lt;</span> <span class="nx">l</span><span class="p">;</span> <span class="nx">i</span><span class="o">++</span><span class="p">)</span> <span class="p">{</span>
            <span class="nx">s</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span> <span class="nx">QueryString</span><span class="p">.</span><span class="nx">stringify</span><span class="p">(</span><span class="nx">obj</span><span class="p">[</span><span class="nx">i</span><span class="p">],</span> <span class="nx">c</span><span class="p">,</span> <span class="nx">name</span><span class="p">)</span> <span class="p">);</span>
        <span class="p">}</span>

        <span class="k">return</span> <span class="nx">s</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="nx">sep</span><span class="p">);</span>
    <span class="p">}</span>
    <span class="c1">// now we know it&#39;s an object.</span>
    <span class="c1">// Y.log(</span>
    <span class="c1">//     typeof obj + (typeof obj === &#39;object&#39; ? &quot; ok&quot; : &quot;ONOES!&quot;)+</span>
    <span class="c1">//     Object.prototype.toString.call(obj)</span>
    <span class="c1">// );</span>

    <span class="c1">// Check for cyclical references in nested objects</span>
    <span class="k">for</span> <span class="p">(</span><span class="nx">i</span> <span class="o">=</span> <span class="nx">stack</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">;</span> <span class="nx">i</span> <span class="o">&gt;=</span> <span class="mi">0</span><span class="p">;</span> <span class="o">--</span><span class="nx">i</span><span class="p">)</span> <span class="p">{</span>
        <span class="k">if</span> <span class="p">(</span><span class="nx">stack</span><span class="p">[</span><span class="nx">i</span><span class="p">]</span> <span class="o">===</span> <span class="nx">obj</span><span class="p">)</span> <span class="p">{</span>
            <span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s2">&quot;QueryString.stringify. Cyclical reference&quot;</span><span class="p">);</span>
        <span class="p">}</span>
    <span class="p">}</span>

    <span class="nx">stack</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">obj</span><span class="p">);</span>
    <span class="nx">s</span> <span class="o">=</span> <span class="p">[];</span>
    <span class="nx">begin</span> <span class="o">=</span> <span class="nx">name</span> <span class="o">?</span> <span class="nx">name</span> <span class="o">+</span> <span class="s1">&#39;[&#39;</span> <span class="o">:</span> <span class="s1">&#39;&#39;</span><span class="p">;</span>
    <span class="nx">end</span> <span class="o">=</span> <span class="nx">name</span> <span class="o">?</span> <span class="s1">&#39;]&#39;</span> <span class="o">:</span> <span class="s1">&#39;&#39;</span><span class="p">;</span>
    <span class="k">for</span> <span class="p">(</span><span class="nx">i</span> <span class="k">in</span> <span class="nx">obj</span><span class="p">)</span> <span class="p">{</span>
        <span class="k">if</span> <span class="p">(</span><span class="nx">obj</span><span class="p">.</span><span class="nx">hasOwnProperty</span><span class="p">(</span><span class="nx">i</span><span class="p">))</span> <span class="p">{</span>
            <span class="nx">n</span> <span class="o">=</span> <span class="nx">begin</span> <span class="o">+</span> <span class="nx">i</span> <span class="o">+</span> <span class="nx">end</span><span class="p">;</span>
            <span class="nx">s</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">QueryString</span><span class="p">.</span><span class="nx">stringify</span><span class="p">(</span><span class="nx">obj</span><span class="p">[</span><span class="nx">i</span><span class="p">],</span> <span class="nx">c</span><span class="p">,</span> <span class="nx">n</span><span class="p">));</span>
        <span class="p">}</span>
    <span class="p">}</span>

    <span class="nx">stack</span><span class="p">.</span><span class="nx">pop</span><span class="p">();</span>
    <span class="nx">s</span> <span class="o">=</span> <span class="nx">s</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="nx">sep</span><span class="p">);</span>
    <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">s</span> <span class="o">&amp;&amp;</span> <span class="nx">name</span><span class="p">)</span> <span class="p">{</span>
        <span class="k">return</span> <span class="nx">name</span> <span class="o">+</span> <span class="s2">&quot;=&quot;</span><span class="p">;</span>
    <span class="p">}</span>

    <span class="k">return</span> <span class="nx">s</span><span class="p">;</span>
<span class="p">};</span>
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